Thermostatic valve



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P. J. CULILIHNfi THERMOSTATIG VALVE Filed Sept. 16, 1921 lll l-ll

t t ll 1* FWTFTt ill. tlfil'llill llll, F FFUULYN, NEW ll'Ul't lit THFUSTFLTTE WillTiFld.

- application tied tepternber 1t, 1921.

To all whom it may concern:

Be it known that l, Fnrnn wl. Connms, a citizen of the United States, and a resident of the borough of Brooklyn, in the county of liings, city and State of New York, have invented certain new and useful limprovemerits in Thermostatic Valves, of which the following is a specification, reference being made to the accompanying drawings, forming a part thereof.

My invention relates particularly to thermostatic valves having a quick snap-action both in opening and closing so as to instantly admit or shut 0d the fuel gas when the temperature falls below or exceeds the predetermined limits.

The objects of my invention are, among I other things, to provide a simple and effectill tive valve of this type comprising a minimum of parts which shall be combined to cause the instant action of the valve in opening or closing; also to provide a means for regulating the limits of predetermined tem- .peratureextremes for valve action arranged outside the valve casing, and to form a thermostatic valve which shall be not only positive and quick in action, but also of great compactness and simplicity in its structure so that in making adjustments for difierent temperature extremes, no disturbance of the operating parts need be made.

With these and further objects in view,

the invention comprises the construction.

and arrangement of operating parts herein shown and hereafter to be described as one embodiment of my invention and then par-' ticularly pointed out in the appended claims.

Tn the drawings, Figure 1 is a vertical sectional view of my improved valve, the section being taken in the line 1-1 of Fig: 2, the operating levers being shown in elevation" Fig. 2 is a section taken on the line 2-2 of Fig. 1 looking in the direction of the arrow Fig. 3 is an enlarged section through the valve carrier or fork, the valve being shown in elevation, while the section is taken on the line 3-3 of Fig. it

F'g. l is a side elevation showing the valve and a part of the carrier fork; and

Fig. 5 is a fragmentary sectional view showing the lower side of the coacting valveoperating levers.

Similar numerals refer to similar parts throughout the several figures.

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Referring to the drawings, the valve-casing 6 has a threaded extension 7 on which is'removably secured the bushing 8 which supports the'bottom 9 of the tank or boiler 10 containing the heating fluid, preferably a hot water-heater. The extension 7 is also interiorly threaded to support the tube 11 projecting upwardly into the tank 10, the tube 11 being formed ofcopper or other suitable material having a high coefficient of expansion and contraction under heat and cold. The upper end of the tube 11 is screw-threaded exteriorly to support the cap 12, and screw-threaded interiorly t0 movably carry the disk 13 to which is attached the depending rod 1d made of porcelain or other non-expansible material. This rod 14 may be suitably adjusted in the tube 11 h rotating the disk 13 which supports the rod. The lower end or tip 15 of the rod 14;; slidably projects through the circular plate 16 into the upper part of the casing 6 as shown in Fig. 1.. prise thermostatic elements in my valve apparatus which are immersed in the fluid in the tank or boiler 10., the temperature of which is to be regulated thereby.

'The tip 15 of the rod 14 is arranged to bear on the top surface of the lever 17 fulcrumed on the eccentric trunnions 18 pivoted on the bar 19 secured in the casing 6 as shown in Fig. 2. The outer end 20 of the lever 17 bears on the shoulder 21 formed in the lever 22 fulcrumed on the pin 23 secured to the casing 6. The lower end 24L of the lever 22 is adjustably secured to the bracket 25 by the set-screw 26 (see Fig. 5). The bracket 25 is pivoted on the bar 27 secured to the casing 6, and carries two spaced-apart lever arms 28 and 29 of. equal length extending upwardly toward the bar 19 as shown in Fig. 1.

Within the ends of the levers 28 and 29 is the bracket 30 bolted to the casin 6, as shown in Fig. 1; on this bracket 30 1s pivoted the valve carrier or fork 81 on the pin 32, the fork 31 having the downwardly extending fingers 33 and 3 1: with the slotted opening 35 therebetween as shown in Fig. 2. The valve 36 havin the neck 37 and head 38 slides on the va ve-stem 39 secured to the plate 4L0 integral with the threaded outlet extension 41 formed in the casing 6. The valve 36 coacts' with its seat 42 to open and close the port 423, and is carried by the fork 31 by havingthe neck 37 slidably fitted The tube 11 and rod 14: com

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in the slotted opening 35 as shown in Figs. 1, 2, 3 and 4. The ends of the fingers 33 and 34 are connected to the upper ends of the lever arms 28 and 29 by light coil springs 44 and 45 respectively, while the heavier coil spring 46 is secured at its upper end to the lug 47 fastened to the fulcrum collar 48 of the lever 22 while the lower end of thespring 46 is fastened to the hook 49 integral with the bracket 25 slightly above the fulcrum point in the bar 27 which pivotally carries the lower arms 28 and 29, as shown in Figs. 1 and 5. The lever 22 and the two lever arms 28 and 29 working as a unit constitute a pair of coactlng levers of the third class forming an operative con.- nection between the lever 17 and the springs 44 and 45 aflixed to the valve carrier 31.

Fuel gas enters the casing 6 through the pipe 50 threaded to the extenslon 51, while such gas passes outwardly from the casmg through the port 43, extension 41 and outlet pipe 52 which conducts the gas to the burner (not shown).

Means exterior the valve casing are provided to suitably regulate the valve wlthln different temperature extremes by shifting the fulcrum point of the lever 17 which cooperates with the porcelain rod 14. In the present embodiment, shown in Figs. 1 and 2, I have secured to the eccentric trunnions 18 the arm 53 having the spring-pressed handle 54 to coact with a series of lugs 55 segmentally arranged on the outside of. the

casing 6, whereby the eccentric trunnions 18' may be slightly shifted on the bar 19 so as to raise or lower the fulcrum point of the lever 17 as may be required. This arrangement provides a simple, effective and accurate means of adjustment for the valve with a minimum of movement of any of the opcrating parts of the lever and avoids jamming of any of the cooperating levers directly connected with the valve 36 itself, or

with the snap-action mechanism which operates this valve.

The operation of my improved valve is substantially as follows When the valve 36 is open and gas is flowing therethrough to the burner to heat the water in the tank 10, the various coacting levers to actuate the valve are in the position shown in full lines in Fig. 1. However, when the water has become heated to the required temperature, the tube 11 expands upwardly within the tank 10 and lifts slightly the rod 14 which allows the lever 17 to rise to the dotted line position shown, since the spring 46 on the lever 22 always maintains the rod tip 15 in contact with the top surface of the lever 17. Such lifting movement of lever 17 allows this lever 22 to swing to the left to the dotted line position shown under the force of the springg 46, and compounds such left movement so as to cause the tWo lever arms 28 and 29 also to swing to the left until their upper ends strike the interior of the casing 6 as shown in dotted lines. The coil springs 44 and 45 secured to the levers 28, 29 and carrier fork 31 are drawn in tension as they pass over the pin center 32, and when swung to the left beyond this center 32 instant y slides the valve 36 on its stem to the left to close the port 43. In like manner when the temperature of the Water in the tank 10 falls below the required limit, the tube 11 contracts and the rod 14 forces the lever 17 to its full line position thereby pressing on the shoulder 21 to swing the lever arms 28 and 29 to their full line position throu h the intermediate lever 22 and against t e tension of the spring 46 which is extended thereby. The swinging of the levers 28 and 29 to the right carries the springs 44 and 45 over the pin center 32 thereby snapping the valve 36 off its seat 42 to the full line position shown in Fig. 1.

WVhile the valve-structure herein illustrated and described embodies the invention in a preferred form, it will be understood that changes and variations may be made in the various parts without departing from the principles and scope of the invention.

I claim as my invention:

1. In a thermostatic valve, an expansiblc and contractible body comprising a thermostatic element, a lever of the third class yieldingly held against said element and moved thereby, a pair of coacting levers of like class one of which is actuated by said first lever, a pivoted valve carrier having a valve adjustably secured thereto, and a connection between the second of said pair of c0acting levers and the valve carrier to swing the former over the valve carrier pivot to open and close the valve.

2. In a thermostatic valve, an expansible and contractible body comprising a thermostatic element, a lover of the third class yieldingly held against said element and moved thereby, a pair of coacting levers of l1ke class one of which is actuated by said first lever, a pivoted valve carrier havmg a valve adjustably secured thereto, and a reslhentconnection between the second of saidpalr of coacting levers and the valve carr er to swing the former over the valve carrier pivot to open and close the valve.

3. In a thermostatic valve, an expansible andcontractible body comprising a. thermostatic element, a lever of the third class yleldmgly held against said element and moved thereby, a pair of coacting levers of like class one of which is actuated by said first lever, a valve carrier pivoted to the valve casing provided with a Valve between the fulcrums and ends of said coactin levers, and a connection between H 9 and o nataara the second of said pair of levers and said valve carrier to swing the former over the valve carrier pivot to open and close the Elli valve.

t. in a thermostatic valve, an errpansih-le and contractihle body comprising a thermostatic element, a lever ot the third class yieldingly held against said element and moved therehy, a pair of enacting levers ot lilre class one of which is actuated hy said first lever, a valve carrier pivoted to the valve casing provided with a valve between the tulcrums and ends ot said coacting levers, and a. resilient connection between the end of the second of said pair of levers and said valve carrier to swing the former over the valve carrier pivot to open and close the valve,

5. lln a thermostatic valve, an expansihle third class operatively connected with one another and held under spring tension to vcoact with said element, a pivoted valve,

a sprin connection between the tree end ot'the t ird ot said levers and said valve to swing the former over center teed by said valve-pivot to open and close the valve.

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l. in an apparatns ot the class descrilbed, a valve havin a valve stem, a valve-carrier fork pivote to a casi and havin means to mount said valve-stem thereon, a ever of the third class tnlcrnmed in the casing with its tree end adapted to cross the pivot o-t said valve carrier, a resilient connection between said carrier and said lever end, a thermostatic element, a lever ot the third. class yieldingly held against said element and operated thereby, and a second lever ot the same class havin its free end operatively connected with said first lever hot actnated by the said lever in contact with the thermostatic element to open and close the valve when the resilient connection controlled and actuated by said thermostatic element passes over the carrier pivot.

8. in an apparatus of the class described, a valve having a valve stem, a valve-carrier tor-k pivoted to a casing and having means to mount adjustahly said valve-stem thereon, a lever ot the third class tulcrnmed in the casing with its tree end adapted to cross the pivot of said valve carrier and engage the casing to close the valve, nection between said carrier and said lever end, a thermostatic element, a lever ot the third class yieldingly held against said element and operated thereby, and a second a resilient conlever ot the me class having its tree end operatively connected with said first lever hut actuated by the said lever in contact with the thermostatic element to open and close the valve when the resilient connection controlled and actuated by said thermostatic element passes over the carrier pivot.-

PETER all. tltllhlilltln 

